Album artist tag for multidisc albums

[simoncn]

The recommended approach for this is to tag only the main artist for the album in the AlbumArtist tag and tag individual artists using Artist tags. If there is no main artist, you could tag AlbumArtist as a generic name such as Various Artists. If each disc of a multidisc album has the same AlbumArtist tag, this will enable MinimServer to merge the album discs correctly.